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Information and Ideas / Command of Evidence Difficulty: Easy
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  • The following 4 lines are shown:
    • Rincón
    • Isabela
    • San Sebastián
    • Ponce
  • The Rincón line:
    • Begins at May, 6.3 inches
    • Falls gradually to June, 5.8 inches
    • Rises gradually to July, 6.5 inches
    • Rises sharply to August, 8.3 inches
    • Falls sharply to September, 6.4 inches
  • The Isabela line:
    • Begins at May, 7.6 inches
    • Falls gradually to June, 6.4 inches
    • Falls gradually to July, 4.7 inches
    • Rises gradually to August, 6.4 inches
    • Falls gradually to September, 6.1 inches
  • The San Sebastián line:
    • Begins at May, 12.9 inches
    • Falls gradually to June, 11.3 inches
    • Falls sharply to July, 7.9 inches
    • Rises sharply to August, 10.3 inches
    • Rises gradually to September, 10.9 inches
  • The Ponce line:
    • Begins at May, 4 inches
    • Falls sharply to June, 1.9 inches
    • Rises gradually to July, 2.8 inches
    • Rises gradually to August, 3.9 inches
    • Rises gradually to September, 5.9 inches

A student is presenting average monthly rainfall totals in various Puerto Rican cities for a science class. During the presentation, the student notes that in September blank

Which choice most effectively uses data from the graph to complete the statement?

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Explanation

Choice C is the best answer because it most effectively uses data from the graph to complete the statement about average rainfall in September in select Puerto Rican cities. The graph shows that between 1981 and 2010 Rincón, Ponce, and Isabela all had an average rainfall during the month of September of about 6 inches, and San Sebastián had an average rainfall of nearly 11 inches. Describing the average September rainfall of Rincón, Ponce, and Isabela as below 8 inches and the average September rainfall of San Sebastián as greater than 8 inches therefore offers an accurate description of the data in the graph and most effectively completes the statement.

Choice A is incorrect because it offers an inaccurate interpretation of the data in the graph. The graph shows that in September, Rincón, Isabela, and Ponce all have an average rainfall of about 6 inches, and San Sebastián has an average rainfall of nearly 11 inches. Therefore, Rincón’s average rainfall is the same as, not greater than, that of Isabela and Ponce, and it is below, not greater than, that of San Sebastián. Choice B is incorrect because it inaccurately describes the data in the graph. In September, Rincón and Ponce have an average rainfall of about 6 inches, not 5 inches; Isabela has an average rainfall of about 6 inches, not 10 inches; and San Sebastián has an average rainfall of nearly 11 inches, not 10 inches. Choice D is incorrect because although the graph shows a similar average rainfall (about 6 inches) for Rincón and Isabela in September, it doesn’t show that Ponce has a similar average rainfall to San Sebastián during this month. In September, Ponce’s average rainfall is about 6 inches, whereas San Sebastián’s average rainfall is nearly 11 inches.